Improvement in stump-machines



UNITED STATES PATENT EEICE.

JOEL ARNOLD, OE ELMIRA, NEW YORK.

IMPROVEMENT IN STUMPlVlAC|llNES.

Specification forming part of Letters Patent No. 36,887. dated November 11, 1862.

To all whom it may concern:

p Beit known that I, JOEL ARNOLD, of Elmira, in t-he county of Cheniung and State of New York, have invented certain new and useful Improvements in Machines for Extracting Stumps and for Similar Purposes; and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings, making part of this specificationy Figure l being a plan of my improved machine; Fig. 2, a longitudinal vertical section thereof, in theplauc indicated by the red line, Fig. l; Fig. 3, a fragment of one of the side pieces of the frame, showing the position therein of the detent for retaining the ratchet-wheel and of the spring for operating the detent; Fig. 4, a side view of the end of one of the base supports or runners of the frame.

Like letters designate corresponding parts in all the iigures.

My invention consists in making the windlass by which the resistance is overcome of two or more sections, of different diameter, on either of which the chain is secured and winds, and having arranged in connection therewith a sliding hook, -which may be adjusted to any position opposite either section, to which hook the opposite end of the chain may be attached, so that the two vends of the chain shall be on the same line, and so that the draft of the chain shall be equable andiregular; and also in the use ot' a sliding detent passing through the side of the frame and engaging with ratchets on the side of the driving-wheel of the windlass, and operated by a suitable spring,which may be raised for the purpose of removing or drawing out the detent.

In general construction my machine resembles others of its class. A suitable frame, A, is provided, preferably made of arched shape longitudinally, to give greater strength and suitablysupported by side braces, B B. Midway across the frame is situated a windlass, C, having on one end a cog-wheel, D, into which meshes a pinion, E,twhose shaft G has on its opposite end a large drum, II. On this drum are wound a number of coils of a rope or chain, I, `which extends forward beyond the machine,tand to which the power for operating the machine is applied. The rope or chain by-nncoiling gives motion to the drum, which in turn transfers it to the other parts. The windlass is made of two, three, or more sections, a b c, of successively increasing diameters, respectively, substantially as represented. p At suitable points on the periphery of the sections are attached hooks cl d, or equivalents, to any of which are secured the ends of the chain or cord K, by which the stump is extracted. In the draw` ings, the chain is represented as double, having its two corresponding ends attached at the opposite extremities of one of the sections of the windlass and winding toward the center. At a suitable distance from the windlass, usually on the side away from its direction ot' motion, is situated a cross-beam, L, of suitable size to sustain the strain brought to bear on it, and its opposite ends resting in bearings ot' the opposite sidepieces of the frame, substantially as represented. This cross-beam is provided with a central vertical longitudinal slot, f, passing entirely through it, and extending nearly its whole length, or sufficiently far to vpass by all of the sections ofthe windlass. In this slot rests the shank of a chain is att-ached to the smallest section, a, of the windlass, the other end being passed down around a root of the stump and secured at the opposite extremity to the hook M, which is placed in the proper position opposite the said section. A great lever-power is thus obtained; but if the stump is smaller, or the resistance to be overcome is less, the chain is unhooked and shifted to one of the largersections, b c, (according to the power to be exslat till it comes in the proper position opposite` the said section to which the chain is shifted, so as to bring the opposite ends of the chain on a line with each other, thereby insuring the best action of the draft. Thus the hook, M, which has secured to its upper end,`

In extracting large stumps one end of the` pended,) and the hook M is slid along in its machine is adapted to overcome resistance of greater or less degree, economizing the relative number of revolutions of the drivingdrum H, and at the same time the use of the sliding hook enables the chain to be adjusted in such a manner that the draft is directly upward in a vertical line. By this manner of' securing the chain the strain is divided between the windlass and crossbeam.

The device as above described is equally applicable to raising weights as to extracting stumps. The only addition required is the necessary block and sheaves for securing the weight and preventing friction. It would be especially useful, for instance, in raising articles from the holds of ships.

Instead of the ordinary ratchet-wheel and pawl for holding the strain of the windlass on the resistance to be overcome, I use animproved arrangement, as follows: Laterally on the inner side of the rim of the cog-wheel D of the windlass is situated a set of ratchets, h h, pointing away from thedrection of motion, substantially as represented. Resting in a suitable socket through the side piece of the frame, below the cross-beam, at a proper position corresponding with the rim of the wheel, passes a detent, N, Fig. 3, substantially of the shape shown, the outer end, 7c, being sharpened to catch and holdin the ratchet-teeth of the cog-wheel. The inner end of the detent projects a little beyond the side piece of the trame, and has resting against it a flat spring, P, Whose opposite end is pivoted at Z, in such a manner that the spring may be turned up away from the detent, so that the latter may be drawn out, as indicated by the red lines, Fig. 2. The spring is held from falling too low beyond the end of the detent by a projecting stop-pin, m, from the frame. rIhe spring yields sufficiently laterally to allow the detent to pass over the ratchetteeth as the cog-wheel moves forward, but always keeps it in place to catch the teeth and prevent the Windlass from turning back. By this arrange-V ment no eXtra independent ratchet-wheel isV required as, under ordinary circumstances, the additional cost of such wheel, together with the fitting of it to the shaft, is avoided. By this means, also, the cog-wheel is made to run close to the frame, thus economizing space. The detent and spring by being situated atthe side of the frame, below the operating parts, are out of the way of thel workmen, and not liable to disarran gement. rIhe position of the operating parts are such that the ordinary ratchet and pawl could not be conveniently applied.

In order to move the machine easily from point to point in the iield, I make the ends of the cross supports or bases It R, on which the frame rests, rounded or runner-shaped, as in` dicated at p, Fig. 4. I also provide rings r 1', respectively, at each end of the runners, into which rings may be hooked chains for draw` ing the machine.

Vhat I claim as my invention, and desire to secure by Letters Patent, is-

1. The Windlass C, having two or more sections, a b c, of increasing diameters, in combination with thesliding and adjusting hooks M and chain K, in such a manner that the device is adapted to overcome different degrees of resistance by shifting the position ot' the chain, with economy of labor and time, substantially as herein set forth.

2. In combination with the cog-wheel I), provided with lateral ratchets h h, the detent N, spring l?, and stoppin m, arranged substantially as and for the purposes herein speciiied.

In witness whereof I have hereunto signed my name in the presence of two subscribing witnesses. v

his' JOEL X ARNOLD.

mark.

Witnesses:

GEO. L. Davis, SAMUEL MolNTosH. 

